Lifting-jack



j. BIRNLE,

UFTING JACK APPLICAUON FILED JAN. 3o. 1920.

1,35%; l' Patented Jau. fi, 192];

2 SHEETS-'SHEET l. /m/-\ 2 SHEETS-SHEET 2.

mama Jn. 4, 1921,

l. BJORNUE.

LIFTING JACK.

APPLICATION HLED 1m30, 1920.

maar@ n c 'l' T O F FIC E JULIUS BJORNLIE, 0F W'ATERTOWN, SOUTH DAKOTA, ASSIGNOR 'T0 BJORNLIE MANU FACTURING CIVIPANY, 0F W'ATERTVN, .SOUTH DAKTA, A. CORIE'ORATION OF SOUTH DAKOTA.

LIFTING-J'ACK.

Specification of Letters Patent.

'Patented Jan. 1, 1921.

To all whom it may concern Be it known that l, JULiUs BJoiiNLin, a citizen of the Unitedv States, residing at 1Watertown, in the county of Codington and State of South Dakota, have invented certain new and useful improvements in Lifting-Jacks; and I do hereby declare the following` to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention has for its object to provide an extremely simple and highly efficient lifting-jack for motor-propelled vehicles, and it is especially adapted for use while applying or removing` tires from wheels. 1

To the above end, generally stated, the invention consists oi the novel devices and combinations of devices hereinafter described and defined in the claims.

1n the accompanying drawings, which illustrate the invention. like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is an outside elevation of the iniproved lifting-jack applied to the hub of a pneumatic tire-equipped automobile wheel;

Fig. 2 is a rear elevation of the same and also` illustrating, by means of broken lines, the tire as the same would appear when removed from the wheel;

Fig. 3 is an outside elevation of the improved lifting-jack in a folded position;

lfig. 4 is an inside elevation of the same;

Fig. 5 is a detail view, partly in elevation and partly in section, taken on the line 55 of Fig. 3, on'an enlarged scale;

Fig. 6 shows a modified formA of foot for the legs; and

Fig. 7 is an outside elevation of the same.

For the purpose of illustrating the improved lifting-j ack in working position, there is illustrated in the drawings an automobile wheel equipped with a pneumatic tire 8 and indicated as an entirety by the numeral 9, with the exception of the hub 10.

Referring iirst to the improved liftingjack as shown in Figs. 1 to 5, inclusive, the same comprises a pair of legs 11, a windlass shaft 12, having on its outer end a hand crank 13, a windlass drum 14, a lifting cable 1 5,l` a floating s heave 16, and a wheel grapple 17. The legs 11 are pivotally connected at their upper ends by the windlass shaft 12, for folding parallel movement into inoperative positions, as shown in Figs. 3 and 4, or for operative divergiiig relation, as shown in Fig. 1, by inter-connecting their upper ends and forming therein alined bores to form a seat in which said windlass shaft is rotatively mounted. A ratchet wheel 18 is formed with the windlass shaft 12, at its junction with the hand crank 13, and the wilndlass drum 14 is mounted on the other end of said windlass shaft and secured by a pin 12 for rotation therewith.

Both legs 11 are curved outwardly to oii`- set their lower end portions in respect to the windlass drum 14, for a purpose that will presently appear. The extreme lower ends of the legs 11 terminate in horizontal inwardly projecting pins 19, which extend transversely under their offset portions and the windlass drum 14, and have pivoted thereto wide flat feet 20, on the ends of which aie calks 21, which extend the full width of said feet. One end of the lifting cable 15 is attached at 22 to one of the legs 11, and the other end thereof is attached to the windlass drum lei and arranged to be wound thereon or unwound therefrom. The floating sheave 16 is mounted to run on the intermediate portions of the lifting cable l5, and the wheel grapple 17' is attached to said floating' sheave by forming therewith a pair of laterally spaced prongs 23, which embrace said sheave and in which the sheave trunnions 24- are iou'rnaled.

Cooperating with the ratchet wheel 18, to hold the wheel grapple 17 in different elevated positions, there is provided al springpressed pawl 25. To hold the legs l1 vfolded, there is formed on their inner faces a vpair of hooks 26 arranged to be engaged by the wheel grapple 17 when raised under the winding action of the lifting cable 15 on the windlass drum 14. Obviously, the pawl 25 and ratchet wheel 18 will prevent the windlass drum 14 from turning in a direct-ion to unwind the lifting cable 15 and thereby release the wheel grapple 17 from the hooks 26. 1t is also evident that the hooks 26 hold the wheel grapple 17, when interlocking therewith, against swinging movement., together with the floating slieave 16 and cable 15. In the modification shown in Fig. 1, the feet 2O are connected to the lower ends of the legs 11 by ball and socket joints 27.

The wheel grapple 17, as shown, is in the form of a loop arranged to receive the hub 10, as best shown in Fig. 2, when the iinproved lifting-jack is placed at one side of a wheel to be lifted. l/Vith the wheel grapple engaging the hub 10, the wheel may be very quickly lifted by turning the hand crank 13, and the coperating pawl 25 and ratchet 18 will hold the wheel grapple 17 and the wheel in different elevations. l/Vhen the wheel is lifted sufficiently to clear the pins 19, the tire 8 may be removed, thereby drawing its lower end portions into the offset portion of the legs 11, as shown by broken lines in Fig. 2. lWith the tire thus removed from the wheel, the same may be turned horizontally so as to rest on the floor or ground, and minor repairs made in the tire, such as closing punctures. After the necessary repairs are made, the tire maybe again replaced on its rim, and the wheel lowered by first releasing the pawl 25 from the ratchet wheel 18 and then allowing the windlass drum let to slowly unwind by holding the crank 13.

1f it is necessary to entirely remove the tire, the wheel may be lowered and allowed to rest on its rim after the tire is removed therefrom, and moved into a position as shown by broken lines in Fig. 2. After the wheel is lowered, the wheel grapple 17 may be readily detached from the engaging hub 10 and the jack moved into position to free the removed tire. The tire may again be replaced on the wheel by rst placing the same into a position as shown by broken lines in Fig. 2, and then applying the jack in working position and operating the same to lift the wheel.

From the above description, it is evident that the jack may be operated very quickly to raise and lower a wheel, and when not in use, may be folded and the parts thereof locked together by the wheel grapple 17 and hooks 26, as previously described. l/Vhen the lifting-jack is folded, the same is'very compact and occupies a. comparatively small amount of room when stored.

l'lihat l claim is:

1. A lifting-jack including a vframe comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, and a cable-lifting device carried by the windlass drum.

2.IA lifting-jack including a frame. comprising a pair of pivotally connected legs, aI windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, and a cable-lifting device carried by the windlass drum, said legs being offset laterally at their lower ends in respect to the windlass drum.

3. A lifting-jack including a frame comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, said legs being offset laterally at their lower end portions in respect to the windlass drum, the extreme lower ends of the legs being extended under the offset portions thereof, feet pivoted on said extreme lower ends of the legs, and a cablelifting device carried by the windlass drum.

4l. A lifting-jack including a frame comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, said legs being offset laterally at their lower end portions in respect to the windlass drum, horizontal pins on the lower ends of the legs and extending laterally from the same side thereof as the windlass drum, feet pivoted on the pins, and a cable-lifting device carried by the windlass drum.

5. A lifting-jack including a frame comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, a cable and a floating sheave cooperating with vthe windlass drum, and a wheel grapple carried by the floating sheave.

6. A lifting-jack including a frame comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, a cable and a floating sheave coperating with the windlass drum, anda wheel grapple in the form of a hub-engaging loop carried by the floating sheave.

7. A lifting-jack including a frame comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the other end thereof, a cable and a Hoating sheave cooperating with the windlass drum, a wheel grapple in the form of a hub-engaging loop carried by the floating sheave, and a pair of hooks on the legs arranged to receive the hub-engaging loop when the legs are folded to hold the legs folded when the cable is wound taut on the windlass drum.

8. A lifting-jack including a frame comprising a pair of pivotally connected legs, a windlass shaft affording the pivot for the legs, an operating crank on one end of the windlass shaft and a windlass drum on the `other end thereof, a cable and a floating Sheave coperatng with the windlass drum, the Wndlass drum against a movement to a wheel grapple in the form of a hub-enlower the wheel grapple. Y gag-ing loop carried by the floating sheave, In testimony whereof I affix my signature a pair oll hooks on the legs arranged to ren presence of two witnesses.

ceve the huh-engaging loop when the legs J ULIUS BJORNLIE. are Jfolded to hold the legs folded when C the Witnesses: cable is wound taut on the windlass drum, WINFIELD I. WARD,

and a. pawl and ratchet device for holding HARRY D. KILGORE. 

